Facility detail

MYSTIC STATION

173 ALFORD ST, CHARLESTOWN, MA, 02129

Parent company: CONSTELLATION ENERGY GENERATION LLC

Carcinogen PBT — EPA classifications across all reporting years

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Year-over-year total releases

Reported on-site TRI releases in pounds (lbs), grouped by reporting year.

Top chemical totals

The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) across all available years.

Full release table

Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.

All values in pounds (lbs)
Year	Ammonia	Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	Formaldehyde	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	n-Hexane	Total (lbs)
2021	9,445	—	—	—	—	9,445
2020	16,121	—	—	—	—	16,122
2019	20,758	—	—	—	—	20,759
2018	44,668	—	—	19,000	—	63,669
2017	55,068	—	—	15,000	—	70,070
2016	80,968	—	—	28,000	—	109,000
2015	32,930	—	—	26,000	35,001	93,933
2014	29,640	—	—	22,000	—	51,640
2013	63,625	—	—	—	—	63,712
2012	60,400	—	—	—	—	60,508
2011	61,200	—	—	—	—	61,320
2010	75,860	—	—	—	—	75,979
2009	59,200	—	—	—	—	59,307
2008	42,375	—	—	—	—	42,478
2007	44,803	—	—	—	—	44,912
2006	200,456	—	41,812	—	—	243,470
2005	148,797	—	31,756	—	—	181,446
2004	164,365	—	35,376	—	—	200,727
2003	124,731	29,159	26,871	—	4,016	185,564
2002	27,408	25,114	—	—	14,096	67,404
2001	—	34,053	—	—	9,858	47,345
2000	—	38,724	—	—	1,972	46,567
1999	—	72,438	—	—	5,882	84,064
1998	2,450	119,727	—	—	1,638	133,468

▎ Facilities report to EPA's TRI once they manufacture, process, or use a listed chemical above set thresholds. Once that threshold is crossed, they must report actual releases regardless of size — so a small number reflects genuine low-level discharge, not a data error.